. 2020 Jun 6;30(6):877–884. doi: 10.1007/s00787-020-01566-9

Table 3.

Regression models predicting hyperactivity/inattention at age 14

	R²	R² change	F	B	SE	ß	t	p	CI low	CI upper
Model 1	0.04		46.94***
(constant)				2.09	0.43		4.90	< 0.001	1.25	2.92
Activity
Sedentary				− 0.002	0.001	− 0.07	− 4.00	< 0.001	− 0.004	− 0.001
Light				0.003	0.001	0.05	2.64	0.008	0.001	0.005
Moderate				0.02	0.004	0.12	5.04	< .001	0.01	0.03
Vigorous				0.004	0.005	0.02	0.87	0.39	− 0.005	0.13
Model 2	0.34	.01***	477.07***
(constant)				1.15	.36		3.19	0.001	0.44	1.85
SDQ Age 7				0.55	0.01	0.55	45.94	< 0.001	0.53	0.57
Activity
Sedentary				− 0.002	0.001	− 0.04	− 3.12	0.002	− 0.003	− 0.001
Light				< 0.001	0.001	0.003	0.22	0.828	− 0.001	0.002
Moderate				0.01	0.004	0.07	3.49	< 0.001	0.005	0.019
Vigorous				0.001	0.004	0.006	0.37	0.72	− 0.006	0.009
Model 3	0.35	.004***	159.06***
(constant)				3.35	.48		7.00	< 0.001	2.41	4.29
Age 7 SDQ				0.52	0.01	0.52	40.91	< 0.001	0.49	0.54
Sex				− 0.42	0.07	− 0.09	− 6.56	< 0.001	− 0.55	− 30
Age 7 BMI				− 0.08	0.02	− 0.08	− 4.20	< 0.001	− 0.12	− 0.05
Age 14 BMI				0.03	0.01	0.05	2.66	0.008	0.008	0.05
Month of birth				0.01	0.01	0.01	0.87	0.382	− 0.009	0.02
Highest academic level				− 0.12	0.03	− 0.06	− 4.45	< 0.001	− 0.17	− 0.07
Income				− 0.001	< 0.001	− 0.06	4.39	< 0.001	− 0.001	< 0.001
Ethnicity
Mixed				− 1.15	0.35	− 0.04	− 3.33	0.001	− 1.83	− 0.47
Asian				− 56	0.14	0.05	− 4.02	< 0.001	− 0.83	− 0.28
Black				0.04	0.18	0.003	0.22	0.823	− 0.31	0.39
Other				0.18	0.28	0.008	0.63	0.531	− 0.37	0.73
Activity
Sedentary				− 0.001	0.001	− 0.04	− 2.62	0.009	− 0.003	− 0.0003
Light				− 0.001	0.001	0.01	0.68	0.496	− 0.001	0.002
Moderate				0.01	0.004	0.03	1.36	0.173	− 0.002	0.01
Vigorous				0.003	0.004	0.01	0.71	0.476	− 0.005	0.1

Linear regression models show that all activity levels at age 7, apart from vigorous behavior, significantly predict ADHD symptoms at age 14. When controlled for ADHD symptoms at age 7, sex, BMI, SES, month of birth and ethnicity, less sedentary behavior remains as a significant predictor of ADHD symptoms at age 14. Significant p values are in bold